The answer is A
Hope it helps!
Answer:
Explanation:
Consider:
The equation for the Poynting vector is given as:
∴
I think its 60. I think you would subtract 144-84 to get the mass of the vinegar molecule.
Okay so you have to find acceleration first. I used v=vo+at. Plug in the numbers and you get -11.9m/s^2 as your constant acceleration. Then plug acceleration into d=vi(t)+1/2(a)t^2
d=(40m/s)(3.34s)+1/2(-11.9m/s^2)(3.34s)^2
d=68.6m
Power = change in work/change in time
P = 600 joules/ 4 seconds
P= 150 watts
hope this helps :)